Nicholas Hytner's Othello was so good I saw it twice. It's not the first time Sir Nick has wowed the critics. And I somehow doubt it will be the last. I perch comfortably outside his office, staring at black-and-white action shots of hit after hit: Adrian Lester in Henry V, Simon Russell Beale in Much Ado About Nothing, James Corden in One Man, Two Guv'nors. If there's such thing as a grammar of theatre, Hytner is fluent in it.